meatus

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meatus

 [me-a´tus] (pl. mea´tus) (L.)
an opening or passage, especially one leading to the body surface. adj., adj mea´tal.
acoustic meatus (meatus acus´ticus) either of two passages in the ear; the external acoustic meatus leads from the auricle to the tympanic membrane (eardrum) and the internal acoustic meatus is for passage of nerves and blood vessels.
auditory meatus acoustic meatus.
meatus na´si (meatus of nose) one of the three portions of the nasal cavity on either side of the septum: inferior (meatus nasi inferior), middle (meatus nasi medius), and superior (meatus nasi superior).
ureteral meatus ureteral orifice.
meatus urina´rius (urinary meatus) the opening of the urethra on the body surface, through which urine is discharged.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

me·a·tus

, pl.

me·a·tus

(mē-ā'tŭs), [TA]
A passage or channel, especially the external opening of a canal.
Synonym(s): external opening
[L. a going, a passage, fr. meo, pp. meatus, to go, pass]
Farlex Partner Medical Dictionary © Farlex 2012

meatus

(mē-ā′təs)
n. pl. mea·tuses or meatus
A body opening or passage, such as the opening of the ear or the urethral canal.

me·a′tal (-təl) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

meatus

A natural opening of a tubular lumen, which in the usual working medical parlance refers to the urinary meatus located in the glans penis or in the vulva. Other meatuses include the external and internal auditory meatuses, and the superior, middle and inferior meatus of the nose.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

me·a·tus

, pl. meatus (mē-ā'tŭs) [TA]
A passage or channel, especially the external opening of a canal.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

meatus

Any passage or opening in the body.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

meatus

any natural opening or passage, particularly the external auditory meatus leading to the TYMPANUM in the ear.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

me·a·tus

, pl. meatus (mē-ā'tŭs) [TA]
Passage, especially external opening of a canal.
Medical Dictionary for the Dental Professions © Farlex 2012